/*
 * Copyright (C) 2018 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.common.collect;

import java.util.Collection;

/**
 * Never actually created; instead delegates to JdkBackedImmutableMultiset.
 */
class RegularImmutableMultiset<E> extends ImmutableMultiset<E>
{
    static final ImmutableMultiset<Object> EMPTY =
            JdkBackedImmutableMultiset.create(ImmutableList.of());

    RegularImmutableMultiset()
    {
    }

    static <E> ImmutableMultiset<E> create(Collection<? extends Entry<? extends E>> entries)
    {
        if (entries.isEmpty())
        {
            return ImmutableMultiset.of();
        }
        else
        {
            return JdkBackedImmutableMultiset.create(entries);
        }
    }

    @Override
    public int count(Object element)
    {
        throw new AssertionError();
    }

    @Override
    public ImmutableSet<E> elementSet()
    {
        throw new AssertionError();
    }

    @Override
    Entry<E> getEntry(int index)
    {
        throw new AssertionError();
    }

    @Override
    boolean isPartialView()
    {
        throw new AssertionError();
    }

    @Override
    public int size()
    {
        throw new AssertionError();
    }
}
